Pressure relief valve activating pressure at 50 Hz [bar]:
Maximum working over‐
pressure [bar]
ASK 28 ASK 34 ASK 40
8.0 10 10 10
11.0 13 13 13
15.0 16* 16* 16*
* China: 15.9
Tab. 10 Pressure relief valve activating pressure (50Hz)
Pressure relief valve activating pressure at 60 Hz [bar]:
Maximum working over‐
pressure [bar]
ASK 28 ASK 34 ASK 40
8.5 10 10 10
11.0 13 13 13
15.0 16 16 16
Tab. 11 Pressure relief valve activating pressure (60Hz)
2.8 Flow rate (constant delivery volume relative to intake conditions)
Flow rate [m
3
/min] at 50 Hz mains frequency:
Max. working pres‐
sure [bar]
ASK 28 ASK 34 ASK 40
8.0 2.85 3.50 4.05
11.0 2.38 2.98 3.50
15.0 1.90 2.47 2.90
Flow rate as per ISO 1217:2009. Annex C
Tab. 12 Flow rate (50Hz)
Flow rate [m
3
/min] at 60 Hz mains frequency:
Max. working pres‐
sure [bar]
ASK 28 ASK 34 ASK 40
8.5 2.80 3.40 4.00
11.0 2.40 2.90 3.45
15.0 1.82 2.40 2.83
Flow rate as per ISO 1217:2009. Annex C
Tab. 13 Flow rate (60 Hz)
2 Technical Specifications
2.8 Flow rate (constant delivery volume relative to intake conditions)
901824 12 E
Operating Manual Screw Compressor
ASK
7